1,2

P. De Geest, Squares containing at most three distinct digits, Index entries for related sequences

Hisanori Mishima, Sporadic tridigital solutions

Cf. A053884.

Sequence in context: A082215 A123179 A136094 this_sequence A068490 A077735 A068121

Adjacent sequences: A053882 A053883 A053884 this_sequence A053886 A053887 A053888

nonn,base,more

Patrick De Geest (pdg(AT)worldofnumbers.com), Mar 15 2000.

One more term from Jon E. Schoenfield (jonscho(AT)hiwaay.net), Sep 03 2006

One more term from Herman Jamke (hermanjamke(AT)fastmail.fm), Dec 23 2007